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Defector ·Smart escape

Who Needs Life on Mars When It Has Glacial Spiders?

by Patrick Redford

Published 2026-08-28 15:35:04+00:00

If nothing lives on Mars, what keeps erupting through the ice at the south pole?

0:00 / 7:23 · Narrator Charon

Context

Every time a rover beams a new image back to Earth, the public asks the exact same question: is there any sign of aliens? In a piece published on 28 August 2026, Defector suggests this obsession with ancient microbes actually obscures the real story of the red planet. Mars is currently shaped by massive, active geological forces—including springtime eruptions of trapped carbon dioxide that look exactly like giant spiders. The essay steps back from the hunt for biology to ask whether a planet really needs to host life to be considered alive.

Show notes

An overview of Mars's active geology, focusing on the "glacial spiders" that form at the planet's south pole. Outlines how the planet lost its thick atmosphere and why most of its glaciers sit frozen in place, before detailing the mechanics of the southern ice cap. There, trapped carbon dioxide gas builds pressure under the winter ice until it erupts into dust geysers.

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